Process Equipment and Plant Design - Section 1 (2)

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Process Equipment and Plant Design - Section 1

There are many MCQs available for this field and
you will find them in this section. You can solve them easily without any problem.

9.

For laminar flow (N_Re < 2100) in steel pipe, the optimum inside pipe diameter is given by

A.	Di, opt = 3 Q0.36 ρ0.18
B.	Di, opt = 3.9 Q0.45 . ρ0.23
C.	Di, opt = 7.6 Q0.36 . ρ0.9
D.	Di, opt = 3 Q0.36 . ρ1.86 μ0.08

Answer: Option A

Explanation:

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10.

The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.

A.	Flat plate
B.	Hemispherical
C.	Torispherical
D.	Ellipsoidal

Answer: Option D

Explanation:

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11.

The operating pressure drop range in a bag filter is about __________ mm water gauge.

A.	50-150
B.	5-10
C.	500-1500
D.	1500-2500

Answer: Option A

Explanation:

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12.

The main purpose of providing stepping on the trays is to

A.	increase the residence time.
B.	decrease the pressure drop.
C.	facilitate handling of large flow rate of liquid.
D.	improve the flow condition.

Answer: Option C

Explanation:

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13.

In perforated plate towers, the

A.	hole sizes may be around 1/8" or 3/16".
B.	total hole area may be around 6 to 15% of tower cross-sectional area.
C.	pressure drop is less compared is similar bubble cap towers.
D.	all (a), (b) and (c).

Answer: Option D

Explanation:

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14.

What is the value of 'q' for saturated liquid feed to a distillation column ?

A.	0
B.	<1
C.	1
D.	>1

Answer: Option C

Explanation:

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15.

__________ tray arrangement is recommended for distillation column having diameter upto 4 ft.

A.	Radial flow
B.	Cross flow
C.	Split flow
D.	Cascade

Answer: Option B

Explanation:

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16.

The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about __________ mm of water column per metre height of packing.

A.	1-5
B.	20-40
C.	100-150
D.	1000-1500

Answer: Option B

Explanation:

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